Double-click behavior and multiple windows fixes

Instead of opening the "detail view", double-clicking on a log item now immediately takes you straight to the line in the source code where the log statement was made. Using double-click + alt opens the "detail view" instead, since this is a less-likely scenario.

Also, tweaked the AppleScript to make it faster (the call to `open "$file"` was *especially* affecting responsiveness). In case there are multiple NSLogger debugging sessions going on, as well as multiple Xcode project windows open, the changes to xedReplacement.sh bring the proper window to be the frontmost while still avoiding the slowness of the `open` command in the bash script.
Merge pull request #114 from PaulCapestany/myFork

Double-click behavior and multiple windows fixes